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F L = Load or resistance force; s = Rope displacement (distance pulled) or effort distance; h = Height (distance load is raised) or resistance distance; An illustration showing how pulleys are used to obtain a mechanical advantage. Using additional pulleys decreases the force required but increases the distance required to raise a load the same ...
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Diagram 3 shows three rope parts supporting the load W, which means the tension in the rope is W/3. Thus, the mechanical advantage is three-to-one. By adding a pulley to the fixed block of a gun tackle the direction of the pulling force is reversed though the mechanical advantage remains the same, Diagram 3a. This is an example of the Luff tackle.
A Z-Drag or Z-Rig is an arrangement of lines and pulleys, effectively forming a block and tackle, that is commonly used in rescue situations. [1] The basic arrangement results in pulling the hauling end 3 times the distance the load is moved, providing a theoretical mechanical advantage of three to one .
The following other wikis use this file: Usage on ca.wikipedia.org Nivell Fermi; Semi metalls; Usage on fr.wikipedia.org Métal; Liaison métallique
Resistance bands come in many forms and are used for various types of workouts, including physical therapy, pre-workout mobility warmups, strengthening muscles, speed and agility drills, and ...
Belts are looped over pulleys and may have a twist between the pulleys, and the shafts need not be parallel. In a two pulley system, the belt can either drive the pulleys normally in one direction (the same if on parallel shafts), or the belt may be crossed, so that the direction of the driven shaft is reversed (the opposite direction to the ...
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